HIGHROCK Cool Bicycle Heading/Taillight floodlight, Pack of 2 pcs Blue Apply to bicycle Material: high quality silicone. Dimension: 2.2"*2.4"*1.77" /5.5*6.1*4.5cm(L x W x H). Package includes 2 pcs bike lights ( without the batteries ) Match the battery type: 3 * AAA batteries